Settling tank



Oct. 30, 1951 J. c. SEAILLES 2,573,615

SETTLING TANK Filed May 23, 1946 I INVENTOR JEAN CHARLES SEAILLES ATTORNEY Patented Oct. 30, 195 1 i OFFICE SE'I TLING TANK Jean Charles Sailles, Paris, France I Application 23, 1946, SeriaINo. 672,846

In France Mall, 1945,

This invention relates to apparatus for the separation of solids from'liquids. It relates more particularly tosettling equipment including Spaced inclined settling plates to hasten the separation and increase the output of settled-material in proportion to the overall capacity of the settling tank in'which-the equipment is contained. l

Briefly stated the invention comprises settling equipment comprising. a. series of spaced generally parallel settling plates to' receivesolid material settled from suspension in a liquid; 'In a modification the invention comprises means for oscillating the assembly of settling plates, shutters for directing the flow of suspension to be settled through the assembly, and means for closing the spaces between the lateral edges of adjacent plates. In a modification the invention includes also supplemental settling plates for thickening the sediment deposited on the assembly first mentioned.

The invention will be illustrated by description in connection with the attached drawings to which reference is made.

Fig. 1 is a side sectional view of a preferred form of the invention.

Fig. 2 is a detailed sectional view showing the lateral closing elements extending between the edges of adjacent ones of the settling plates.

Fig. 3 is a View of a modified form showing perforations in the settling plates.

Fig. 4 is a side view partly in section of a modified form of the settling equipment.

The views are in part diagrammatic and the parts not shown are conventional.

There are shown tank 1 containing a fluid suspension 2 from which suspended particles are to be settled, and an assembly of spaced parallel settling plates 3.

The plates are pivotally mounted as at 4 and 5. A shutter plate 6 extends upwardly from the uppermost one of the settling plates and another shutter plate 1 extends downwardly from the lowermost of the settling plates, these shutter plates serving as baflles to direct the flow of suspension.

Gate l (Fig. 1) is for discharge of settled sludge.

The lateral members closing the space between side edges of the plates are shown at 8 and perforations in adjacent ones of the plates at 9.

In Fig. 4 there is shown a modified form of settling tank I 0, parallel settling plates II, a baffle I2 disposed below the said plates for delivering sediment therefrom to the series of par- 2' Claims. (CI. 210-57 allel thickening plates l3 disposed below the plates first mentioned and below the said baflie. "Ihis'equipment of Fig. 4 has inlet line l4 and gates i5 for discharge of solid material, as well as the conventional overflow outlet (not shown).

When the perforated plates are used as in Fig.

3,'there is disclosed an imperforate plate l6 below the last of the perforate plates and a discharge l'l belowthe discharge end of the imperforate plate.

I The shutterplates 6 and I serve to provide the direction of flow of the suspension of solids in the liquid medium and to cause the suspension to flow through the spaced, approximately parallel settling plates from end to end thereof.

The operation of the equipment will be largely evident from the description of it that has been iven.

A suspension of the solids to be separated is delivered to the tank I of Fig. 1 by any conventional means (not shown) or to the tank ID of Fig. 4 through the inlet pipe I 4. The shutter plates or baffles 6 and I of Fig. 1 or the natural currents in the use of the equipment of Fig. 4

direct the flow of suspension between the par-- allel settling plates 3 or i I. When the side closing means 8 of Fig. 2 are used these promote flow of the suspension through the plates from end to end with a minimum of disturbance and no outflow through the side edges thereof. v

The discharge of sediment on the plates 3 is promoted by oscillation of the assembly from time to time on the pivot points 4-5, either by force applied manually as to the exposed end of the shutter plate 6 or by any suitable mechanical means which is not shown but which is usual for such purpose.

In the embodiment shown in Fig. 4 the sediment which falls from or is discharged from the settling plates ll strikes a bafile board l2 and is deflected between the parallel plates [3 in the lower or thickening assembly. Here the material settles again beflore finally falling from the thickening plates [3 to one of the outlets l5 shown at the bottom of that equipment.

The perforations of the settling plates 9 (Fig. 3) cause the settled and originally somewhat watery material from the perforated plates 9 to pass through the openings as the material moves downwardly on the plates towards the discharge. The material finally settles upon the imperforate plate I6 which is the lower one of the series in Fig. 3. From that plate the material passes to the sediment discharge H.

The apparatus is simple to construct, effective in giving rapid sedimentation of material and of high capacity of output of such material in proportion to the volume of the tank used for the fluid mixture to be settled.

It will be understood that the structures i1- lustrated in Figs. 2 and 3 are alternates for the assemblies of settling plates as shown in Fig. 1 and may be substituted therefor.

It willrbe understood also that itislmtended. to cover all changes and modifications: of the examples of the invention herein chosen for the vention.

What I claim is: 14:5-

1. Settling apparatus for separating suspended solid material from the liquid mediurhinaidr: bid mixture, the apparatus comprising a' tank 2,573,615 1 .fli'i 2. The settling apparatus of claim 1 including a pivotal mountin of the said settling plates for holding the turbid mixture, an outleti' for;

settled material, a seriesjof spaced approximately parallel settling plates disposed in normally, in? .clined manne thin t ank and h low he top her s ng mean endin etw en the lateral edges o f the settlin plates and 01951195 the spaces bet en e at s at. the s ed es t a shut e plate extendin f om the low st oneof heflsa s p at s n a sec n shut er pl e x e d ng upwar ly r m t e uppe ost ne o th said plates. h shutterpl s s in as baliles to direct the flow of the 30 Nu throu ht e aid paces defined between t settlin plates.

causing the said plates to be movable on the mounting and including a pivotal mounting of the said shutter plates so that the settling plates and the shutter plates are independently movable.

JEAN CHARLES SEAILLES.

R E NGES Q ED The "following" references" are of record in the e of this atent:

purpose of illustration which do not constitute- 11111 p departures from the spirit and scope of ther in- M 7.

UNITED STATES PATENTS Name Date .QAilfi Howatson June 29, 1886 3 9,990 Gaillett et a1. Sept. 28, 1886 i {$51398 MacNab, Sr.,' et al. July 26, 1887 751,038 Wollaston Feb. 2, 1904 51,020,013 Arbuckle Mar. 12, 1912 1,177,849 De Kalb Apr. 4, 1916 1,190,863 Corr e et a1 July 11,1916 1,8 5,550 hulte S pt. 29.11931 1,364,511 Jnne ie 21, 1 .3. 2,21% 8 iawley -s-- Sep 0, 1.949 213161-783. Geary p 2 1 3 2.35.3.6Q2 Tmtt r a u, Ju y 11. 1.9% 2,498,292- ausle ?.-.-.-Y--,-- F b- 2,1 1950 FOREIGN PATENTS Coun ry Date 386,312 Great Britain f Jan. 4. 19.33 674,925. France v Oct. 28, 1929 

